Power transmission



Dec. 2, 1930.

s. c. CARTER POWER TRANSMISSION Original Filed March 27, 1929 I Il ll Il I I jhm,

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Patented Dec. 2, 1930 N UNITED STATES'PATENT OFFICE saMJELo. CARTER, n

CENT To ROBERT E. EELCHER, rro WILLIAM H. MAXWELL, OE

VCALIISORNI.A.AND TEN PER CENT TO Di M1 GAILLIS, OF LONG BEACH, CALIFORNIA POWER- TRANsMIssiON Continuation of applcationserial No. 350,273, ledjMarch 27, 1929. This application ld January 29,

`1930. Serial This application is filed in substitution for and as a continuation of my copending applicationV for patent entitled, Reduction and reverse gearing, tiled March 2'?,k 1929, Serial No; 350,273.

Itis a general object of the invention to provide a simple, compact, and improved speed reduction and reverse gear mechanism.

Another object of the invention is to pro-1 vide a power transmission of the character mentioned that embodies only three principal parts or gears, namely, a drive gear, a driven gear, and areversing gear.

Another object of the invention is to pro-- `vide a power transmission of the character mentioned in whichthe reversing gear is idle or free of the drive gear when the device is operating in a forward direction. y

It is another object of the invention to provide an effective and improved shaft mounting in a power transmitting device'of the general character mentioned.

Afurt-'her object-of the invention is to providea4 transmission in which the driving gear is shiftable between'v a position where it is in meshing or driving engagement with the driven gear and a position whe-re it is in engagement withthe reversing gearwhen f tliereversing gear is in mesh with the driven gear. y

Another object ofthe invention is to pro- `vide a mechanism of theY character mentioned including-an improved and novel form 'of ,driven gear which allows for effective,- dependable mounting. of the other parts of the I mechanism.-

Other obje'ct's'andl features of my invention .will be best andfmore' fully understood from thefollowing detailedy description of a typical form` and application of the invention,

throughout which description reference isv had to Vthe accompanying drawings, in which:

- Fig. 1 isa Vlongitudinal detail sectional view of the device provided byv this inven- Y tion. showing the partsin an idle or inoperative'position. Fig. 21s a reduced fragmentary Y verticali sectionalfview illustrating the drive Y pinionindrivin'g engagementiwith the driven gea-r; Fig. 3 isfaview similar to Fig.A 2 illusdicated by line 4-4 on Fig. 1. Fig. 5 is a` reduced longitudinal sectional View of the bearingfmounting embodied in the invention.

The device provided by the present invention includes, generally, a housing 10, a drive shaft 1-1 extending into the housing 10, a driv en shaft 12 extending into the housing, a driven gear 18 fiXed on the shaft 12, adrivo gear yor pinion 14e on the shaft 11 and adapted to be shifted into and out of meshing engagement with the driven gear 13, and a reversing gear lomountedwithin the housing 10 to be shiftable between a position freeof the gears 13 and 14 and a position where it is in meshing engagement with the driven gear 13 and is driven by the drive pinion 14C.

The casing or housing 10 is provided to encase the various other parts of tlie'device and may be 'of any suitable construction. In the particular form of the invention illustrated in the drawings, the housing includes a tubular shell. 16 and heads or end plates 17 and 18 closing the ends of the shell 16. The shell 16 is preferably an elongated part and may be provided with spaced walls which form a space adapted tocarry a cooling mes dium, or the like. The end plates 17 and 18 completely close the ends of the shell 16 and may be attached to the shell by bolts 19 or other suitable means.

A supporting cage or is provided within the housing 10 to support the ends of the shaftsembodied in the invention. The mounting 20 is substantially tubular in form and is of considerable less dion theniountng 2Q vadjacent the. ange 21x01 bearing mounting 2Ovv be attached to an'k 0F LOS ANGELESjCALIFORNIA, ASSIGNOR 0F THIRTY-FIVE PER Y OF LOS ANGELES, CALIFORNIA, TWENTY PER CENT BEVERLY HILLS,

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engage the inner side of the flange 22 to center the mounting within the housing. One end of the mounting 20, which I will terin the inner end, is open, while the other or outer end is provided with `an end wall 25. The inner end of the mounting is provided with openings 20a and 2Gb which accommodate the gear 14 and the gear 15, respectively. These openings are of sufficient axial and circumferential extent to allow the gears 14 and 15 to be moved into proper mesh or cooperative engagement with the driven gear 13.

The drive shaft 11 may be considered as driven by or from any suitable source of power. The shaft 11 extends through the end plate 17 and is preferably parallel with the longitudinal axis of the housing. The axis of the shaft 11 is spaced or offset laterally from the central longitudinal axis of the housing 10. In the particular case illustrated the shaft 11 extends through an opening 27 in the plate 17. An outwardly extending tubular projection 28 is provided around the opening. A suitable bearing 29 is mounted in the opening 27 to rotatably support the shaft 11 and is held in place by a retainer 27a applied to the outer end of the projection 28. A section of a coupling 3G may be mounted on the outer end of the shaft 11. In the preferred construction packing means is provided around the shaft. I have shown a packing gland 31 carried by the retainer 27a. The shaft 11 preferably extends a considerable distance into the housing 10 and its inner end is supported by the mounting 20. The inner end portion of the shaft 11 extends into a bearing 33 carried in an opening 32 in the end Wall 25 of the mounting` 20.

rl"he drive pinion 14 is mounted on the shaft 11 between the bearings 29 and 33 so as to be freely shiftable longitudinally on the shaft and is keyed or splined to the shaft so as to rotate therewith. The pinion 14 may be mounted on the shaft by keys 34. The pinion 14 may be operated along the shaft 11 by any suitable means. In the drawings I have shown an annular groove 35 provided in a projecting end portion of the pinion 14 which is adapted to receive a suitable shifting yoke 3G. The shifting yoke 36 may extend to a convenient point at the exterior of the housing in the manner common to mechanisms of this general character.

The driven shaft 12 carries the driven gear 13 and extends into the housing 10 throughthe end plate 18. rIhe shaft 12 is parallel with the shaft 11 and is located centrally in the housing. An outwardly projecting boss 36 may be providedon the end plate 18 and has a central opening carrying bearings 37. The bearings 37 rotatably support the shaft 12 and may be retained in the boss 3G by a retainer 38 applied to the outer end of the boss. rIhe retainer 38 has a central opening passing the shaft 12 and a packing gland 39 may be provided in the opening to pack around the shaft. The shaft 12 extends into the housing and has its inner end portion supported in an opening 40 in the end wall 25 of the mounting 2O through a suitable bearing 40.

The driven gear 13 is mounted on the shaft 12 and is positioned and formed so as to be engaged by either the drive pinion 14 or the reversing gear 15. In the particular case illustrated the driven gear 13 consists of a central disk 41 mounted on the shaft 12 be yond the outer endv of the mounting 2O and an axially extending tubular part 42 at the periphery of the disk 41 extending over the outer end portion of the mounting. The disk 41 is arranged adjacent the inner side of the end plate 18 and is provided with a hub 43 which is fixed to the shaft 12 by a suitable key 44, or the like. The tubular portion 42 surrounds the outer portion of the mounting member 20 and is provided on its interior side or wall at the end removed from the disk 41 with a series of teeth 45 forming an internal gear. rlhe portion. 42 is preferably comparatively long` and is positioned so that the teeth 45 are adapted to be engaged by the teeth of the pinion and the reversing gear 15. rIhe portion 42 may be formed separate from the disk in which case it may be provided with an inwardly extending radial flange 46 to be secured to the disk 41 by bolts 47, or the like. A centering flange 48 may be provided on the disk to abut the inner edge of the fla-nge 46 to center the tubular portion 42 within the housing.

The reversing gear 15 is rotatably and shiftably mounted within the housing so that it is operable from a position free of the driven gear 13 and the drive pinion 14 when the drive pinion is in mesh withthe driven gear, and a position where it is in meshing engagement with the driven gear 13 and' is adapted to be engaged oi driven bythe drive pinion 14. In accordance with the invention the reversing gear 15 is mounted within the housing 10 so that it is normally outward of or beyond the part 42 of the driven gear and is operable to be shifted into engagement with the teeth 45 of the driven gear. In the preferred form of the invention the reversing gear 15 is rotatably and shiftably mounted on a fixed shaft 50. The shaft 50 is fixed, for instance, keyed, in an opening 51 in the end plate 17 and extends int-o the housing 10 parallel with the shaft 11. The inner end portiony of the shaft 50 is supported by a block 52 carried by and forming a part of the mounting 20. The block 52 may have an opening 53 carrying the end of the shaft 50 and may be fixed in the mounting 2O by suitable screws 54. The shaft 5() is suiiiciently long to permit the gear 15 to be shifted into and out of engagement with the driven gear 13. In the particular case illustrated the re- `versing gear `15 is larger in diameter than the hgroove 56 is adapted to receive a shifting.

`drive pinion 14 and is` comparatively long so that it is adapted to mesh with'the, driven gear 13 at the same time it is engaged bythe pinion 14. The outer end of the reversing gear`15 may be provided with a reducedportion `having anwannular 'groove 56.V The 45 of the driven gear k13, in which position it is adapted to be driven by the drive pinion 14el as illustrated in Fig. 3 of the drawings.

It is believed that they operation of the device provided by this inventionwill be readily apparent from the foregoing detailed description. In operatin the vdriven shaft 12 `in what I will term a orward direction the Y and out of engagement with'the driven gear,

drive pinion 14 is in directineshing engagenient with the internal driven gear 13, as illustrated 1in Fig. 2 of the drawings. With this positioning of` thefparts the reversing gear 15is free of'bothithe driven gear and `the drive pinion. It `will be obvious that a substantial reduction of speed may be obtained through this construction To reverse the direction of rotation of the shaft 12 or to operate the shaft 12 in a reverse direction, the drive pinion 14 is `shifted to a` `position where it is free of the driven gear 18, but inesheswitli the reversing gear. The reversing gear 15 is then shifted along the shaft 50 s-o that it is broughtinto meshing engagement with the teeth of the driven gear 13. It is obvious, of course that the pinion 14 and the ev rsin ea 15 m b ro or r e g g I' a e p p .when the. reversing.

tioned in various mannersto o tain various speed reductions through the mechanism.I t It is to be particularly noted thatthe mounting member 2O operates to effectively support the inner ends of the shafts 11 and 12 and 50.V

Having described -only a typical preferred form of my invention, I do not wish to limit myself rto the specific details set forth, but Wish to reserve to myself-any changes or variations that may appear to those skilled in the art .or fall within the scope of the following claims.

Having described my invention, I claim:

1. A power transmission including, a drive? L Y aposition where it engagesrthe reversing gear V when the leversingq gear is, .nient with the drivengear,

shaft having a fixed axis, a driven shaft having a fixed axis, an internal driven gear on the driven shaft, a drive gear slidably mounted on the drive shaft adapted to be' shiftedi into engagement with the driven gear, and ai shiftably mounted reversing gear adapted to be shifted into engagement with 4the driven gear, the drive gear .being operable to a position where it isfree of the driven gear' Aving, a, driveY shaft V.extending `into 1nga driven shaft extending into thefhousand engages the reversing gearwhen the 'reversing gear isin engagement with the driven gear, the `drive shaft terminating Vwithin the driven'gean 'f 2. A transmission including a drive shaft liavinga fixed" axis, adriveii shaft having a en gear, the drive shaft .terminating within the internal gear, and means supporting the drivefshaft within the interna-l gear. f 3. A power 'transmission including, a housing, a drive shaft extending into the housing,

a driven shaft extendingginto lthe housing,-an

internal driven gear fixed .on the driven shaft withiny the housing, a `support for the inner end of the driveshaftwithin the driven fgear, a reversing lgear in` the l housing sli-iftable-into a drive gearV slidable i axially on@ and-rotatable with the,V drive 'shaft within the housing and shift able 'between-af position -where it.i Veng-nages -the driven gear and,afpositi'on` where-itengages thereversing geaimwhen the reversing gear `is in .engagement with the driven'. gear.

` Iaihous- `4i. A power transmission including, ing, adrive shaftextending into the-housing,

'a driven shaft extending` into the housing; an finternal driven gear fixed 'on the dri-ven shaft uwithin the.housing,a reversing gear inthe housingshiftable linto Vand `out of engagement with: the driven gear, .a drive .gearfslidabie axiallyfon andrrotatable with the drive shaft within the Vhousing and Vshiftable.between a m5 rposition. where it engagesthe drivenfgeai-.and

.a .position where it engages thereversing, gear y g gear` is in: .engagement with the driven gear,aiid'nieans within-.the

shafts. i Y 5..` A power transmission including, afhous- "the housdriven gearsupporting theinner ends of said H0 ing, a driven gear fixedion the drivenshaft 215 Ywithin. the housing, afreversing gear inthe vrhousing shiftableinto and. out .of engagement withthe driven geaiaa drive gear slidable .axially on and rotatable withthe drive .shaft position where it engagesthe driven ,gear and Vin engageand meansiwithin withi-nmthe` housingandfshiftable between a 2:0

the housing Afor, supportingthe innerends of 125 said shafts, said means including,.`a,unitary mounting member .within the housing.Y

'6. A power` transmission including, a housinga drive shaftextending into thehousing, a-,driven shaft extending into-the housing, an,

internal driven gear fixed on the driven shaft, a stationary shaft in the housing, a reversing gear slidable and rotatable on the stationary shaft and shiftable into and out of engagement With the driven gear, a drive gear rotatable with the drive shaft and slidable thereon between a position Where it engages the driven gear and a position Where it engages the reversing gear, and a mounting member Within the housing supporting one end of each of the said shafts.

7. A power transmission including, a housing, a drive shaft extending into the housing,

a driven shaft extending into the housing, an g internal driven gear fixed on the driven shaft, a stationary shaft in the housing, a reversing gear slidable and rotatable on the stationary shaft and shiftable into and out of engagement with the driven gear, a drive gear rotatable with the drive shaft and slidable thereon between a position Where it engages the driven gear and a position Where it engages the reversing gear, and means rotatably supporting the driven shaft and the drive shaft, said Ymeans including a mounting member fixed in the housing supporting one end of each of the said shafts and bearings carried by the housing and carrying the shafts Where they enter the housing.

8. A power transmission including, a housing, a drive shaft extending into the housing and terminating in the housing and having a fixed axis in the housing, a driven shaft extending into the housing and terminating in the housing and having a fixed axis in the housing, a driven gear rotatable with the driven shaft Within the housing, a reversing gear in the housing shiftable into and out of engagement with the driven gear, a drive gear slidable axially on and rotatable With the drive shaft Within the housing and shiftable into and out of a position Where it engages the driven gear and being in constant engagement with the reversing gear, and means supporting the terminal ends of the shafts Within the housing.

9. A power transmission including, a housing, a drive shaft extending into the housing and supported by the housing on a fixed axis, said shaft terminating Within the housing, a driven shaft extendinginto the housing from the opposite direction and supported by the housing on a fixed axis, means Within the housing supporting the inner ends of the shafts, an internal driven gear fixed on the driven shaft Within the housing, a shaft in the housing having one end supported by the housing, means Within the housing supporting the other end of the last-mentioned shaft, a reversing gear on the last-mentioned shaft shiftable into and out of engagement with the driven gear, and a drive gear slidable axially on and rotatable vvith thedrive shaft Within the housing and shiftable between a position Where it engages the driven gear and a position Where it engages the reversing gear when the reversing gear is in engagement with the i-iven gear.

i0. A reduction reverse gearing comprising a easing, a bearing mounting secured to the inside of said casing, bearings in said bearing mounting, a block in said bearing mounting, a drive shaft extending into said casing and said bearing mounting and journaied'in one of said bearings, a driven shaft extending into said casing and journaled in 'the other bearing in said bearing mounting, an internal driven gear in said casing secured on vsaid driven shaft and into which said bearing mounting and said drive shaft extends, a drive gear splined on said drive shaft to be shifted into and out of mesh with said internaldriven gear, a reversing gear shaft secured one end to said easing and at its other end to said block, and a rever-sing gear rotatably and slidably mounted on said reverse gear shaft to be shifted into and out of mesh with said internal drive gear and into mesh with said drive gear when the latter gear isout of mesh with said internal :i

il. A power transmission of the character described including, three relatively shii'table gears, a drive gear, an internal drivengear,

and a reversing gear, a shaft supporting the ai drive Agear on a fixed axis and terminating Within the driven gear, means supporting the terminal end of said shaft and means mounting the driven gear on a fixed axis, the drive and drivengears being related for relative shifting into and out of cooperative engagement, the reversing gear and the driven gear being related for relative shifting into and out of cooperative engagement and the drive gear and reversing vgear being related for relative shifting so that they can be arranged in cooperative engagement when the drive gear is out of engagement With the driven gear and the reversing gear is in cooperative engagement with the driven gear.

l2. A transmission including, a drive shaft having a fixed axis, a driven shaft having a fixed axis, an internal gear fixed on the driven shaft, a reversing gear shiftable into and out of engagement With the driven gear, a drive gear rotatable with and slidable on the drive shaft and operable between a position in engagement with the driven gear and a position where it engages the reversing gear when the reversing gear is in engagement with the driven gear, the drive shaft terminating Within the internal gear, and a shaft mounting having a part within the internal gear, the shaft mounting supporting the drive shaft and also the driven shaft.

13. A transmission including, a drive shaft having a fixed axis, a driven shaft having a fixed axis, an internal gear fixed on the driven shaft, a counter shaft, a reversing gear on the counter shaft shiftable into and out of ment with the driven gear,

engagement with the driven gear, a drive gear rotatable with and slidable on the drive shaft and operable between a position in engagement with the driven gear anda position where it engages the reversing gear when the reversing gear is in engagement with the driven gear, Jthe drive shaft terminating within the internal gear, and a shaft mount! ing having a part within the internal gear, the shaft mounting supporting thel drive shaft, the driven shaft and the counter shaft.

14. A housing, a drive shaft extending into the housing, a driven shaft extending into the housing, an internal driven gear fixed on the driven shaft within the housing, a shaft carrier within the housing supporting the driven shaft and supporting the drive shaft within the internal gear, a reversing gear in the hou-sing shiftable into and out of engagea drive gear slidable axially on and rotatable with the drive shaft within the housing and shiftable between a position where it engages the driven gear and a position where it engages-the reversing gearwhen the reversing gear is in engagement with the driven gear. Y

In witness that I claim the foregoing I have hereunto subscribed my name this 24th day of January, 1930.

SAMUEL CLARK CARTER.

power transmission including, a l 

